Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal

Acta Metallurgica Sinica (English Letters) ›› 2004, Vol. 17 ›› Issue (2): 147-154 .

Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal

A.G. Huang, Y.S. Wang, Z.Y. Li, J.G. Xiong and Q. Hu

华中科技大学材料学院

收稿日期:2003-04-15 修回日期:2003-07-28 出版日期:2004-04-25 发布日期:2009-10-10

Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal

A.G. Huang, Y.S. Wang, Z.Y. Li, J.G. Xiong and Q. Hu

School of Materials Science & Engineering, Huazhong University of Science and Technology

Received:2003-04-15 Revised:2003-07-28 Online:2004-04-25 Published:2009-10-10

摘要/Abstract

Abstract: The size of austenite grain has significant e®ects on components and proportions of various ferrites in low-alloy steel weld metal. Therefore, it is important to determine the size of austenite grain in the weld metal. In this paper, a model based upon the carbon diffusion rate is developed for computing austenite grain size in low-alloy steel weld metal during continuous cooling. The model takes into account the effects of the weld thermal cycles, inclusion particles and various alloy elements on the austenite grain growth. The calculating results agree reasonably with those reported experimental observations. The model demonstrates a significant promise to understand the weld microstructure and properties based on the welding science.

Key words: low-alloy steel, austenite, mathematical model, diffusion

A.G. Huang, Y.S. Wang, Z.Y. Li, J.G. Xiong , Q. Hu. Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal[J]. Acta Metallurgica Sinica (English Letters), 2004, 17(2): 147-154 .

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Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal

Modeling of Austenite Grain Size in Low-Alloy Steel Weld Metal

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